Pole trailer



March 4, 1930. I b. H. DAVIS ETAL 1,748,976

' POLE TRAILER Filed April 11, 1927 ZZ VJ for. flarmlifflaw's 62 z Z hams.

Patented Mar, 4,1930

WISCONSIN I Application filed April 11,

This invention relates, to trailer vehicles and more particularly to those'of the two wheel type, and has for its object to 'provide a simplified and durable construction.

' It consists in certain featuresoand elements I in and as indicated by the. claims.

- with the draw bar in combination, as shown and described here In the drawings Figure 1 is a side elevation of a two wheel trailer vehicle embodying this invention, the wheel on the nearside being removed.-

i Figure 2, is a plan view of the same.

Figure 3, is. a front end view of the trailer in substantially horizontal position, I

Figure 4, is a plan view of the unit cast frame for the trailer. The two wheel trailer vehicle as illustratedin the drawing,- comprises aunit. cast frame 1, carried on supporting wheels, 2, and axle, 3. Said frame is composed of a pair of laterally projecting arms, 4, extending'in op- "posite directions in vertical alignment with 'bein secured by nuts, 10. Atl'ansversely exv tending leaf spring 11, is disposed above said axle, in alignment therewith and the ends of said spring are suitably shackled to the axle brackets 8, on the pivot, 7, atfi'which the pivot clips, 6, are pivoted. The mid-portion 'of the leaf spring is secured to the under side of the frame, 1, by suitableU-bolts, 12. This spring arrangement suitably supports the frame together with the loald'imp'osed thereon and permits slight lateral play 'of the complete frame, springs and load, in the event of an unbalanced load.

The unit cast frameds. provided with an i'bar 1n a fixed relation with the vehicle. draw bar is adjustable lengthwise with re- 1 PATENT: OFFICE f DURREL H. DAVIS Aim Lenora, WILLIAMS, or EDGERTON, wrsooivsnv, ASSIGNOZRS 'ro HIGHWAY TRAILER coMrANY, or EDGEBTON, WISCONSIN, A. oonrona'rxon or Porn TRAIL R 1927. Serial no. 182,624.

annular opening, 13, extending longitudinal- 1y therethroughfiin approximately central I alignment with the lower side of the arms, 4, for seating a longitudinally extending cylindrical draw bar, 14. Saiddraw bar is preferably of wrought iron pipe for rigidity and-strength. A pair of braces, 15, extend obliquely forward from said frame, and have their forward ends attached to the upper i side'of a supporting ring, 16, loosely mounted about said'draw bar. The draw bar 'is provided with a plurality of apertures, 17 spaced therealong at intervals for registration with the apertures in said ring, 16, through which a pin, 18, is disposed for securing said draw The spect to said vehicles to vary its effective length. An eye, 19-, is'secur'ed to the forward endof the draw bar for attaching to the usual pintle hook on the vehicle which is to pull the-trailer. A: pair of radius rods, 20,

ave their 'rear ends pivoted to ears 21, proj ecting forwardly from the axle brackets, 8, the forward ends of said rods extending obliquely toward each other andbeing pivotally connected-to an adjustable eye .bolt, 22, extending through a lug on the under. side of the supporting ring 16. The connections to the'vehicle proper both above and below thedraw bar, are such as to cause the pull on the draw bar to .be transmitted to the vehicle in balanced; forces.

, The upper portion of. the frame comprises a air of oppositely disposed 'arcuate turnta le. segments, 25 integral with-said frame.

The frame is so designed and reinforced as to secure maximum strength with minimum -weight asevidencedby the cored-out portions, 26, formed by the adjacent reinforcing and connecting-ribs, 27, of the frame. A rectangular shaped pivot bearing support, 28, is formed integral with the frame centrally between and in horizontal alignment-with the top of said turntable segments, and isadapted to swivelly seat a bolster, 29. Said bolster comprises a pair of flanged beam members, 30, connected together in spaced'relation. A hearing plate, 81, is attached to the lower flanges of said beams, and is adapted to V plate, 31, and bearing support, 28. A pair ofspaced bearing shoes, 33, are secured to the under side 'of said beams on opposite sides of the king bolt and have bearing sup-- port on the adjacent turntable segments, 25. A pair of chocks, '34:, are slidably mounted on the upper edges of said beam members, 30, and are adjustably securable in a plurality of positions in the, usual manner.

A unit cast frame for a vehicle as herein described provides a compact durable lightweight construction that may be cheaply fabricated and easily assembled. This type trailer is especially adaptable for transporting lengthy objects such as telephone poles, logs,structural members, etc., and the adjustable draw bar permits the trailer to be located the proper distance in the rear of the pulling vehicle to suitably accommodate the weight and length of such objects. 1

We claim: v

1. In a trailer vehicle,' the combination with a unitary cast-frame, supporting wheels and an axle therefor, the upper surface of said frame forming a turntable, a bolster on said frame, centrally pivoted and bearing on said turntable, integral arms extending lat= erally from opposite sides of said turntable, vertically disposed springs, the upper ends abutting against said arms with their lower ends connected to pivot bracket members on said axle adjacent the wheels, a transversely an axle therefor, the upper side of said frame providing a turntable, a bolster centrally pivoted on said frame having its outer extensions slidably supported on said turntable, said frame having integral arms extending laterally in opposite directions, brackets mounted on said axle, upwardly extending bolts pivoted to said brackets and slidably connected at their upper end to said arms, coil springs on said bolts, in yielding contact with said arms, checking means for limiting the rebound of the frame with respect to the axle, and a leaf spring extending transversely above the axle, connected at its midpoint to said frame, with its outer ends shackled to said brackets.

DURREL H. DAVIS. I LEROY E: WILLIAMS.

extending leaf spring disposed above and in alignment with said axle, the-middle thereof 7 being secured to the under side of said frame ster on the turntable, vertically disposed and the ends of said spring being shackled to said pivot brackets; together with a draw bar connected to said frame above said leaf spring, and radius rods connected at one end to said pivot brackets, the other ends extend- 'ing obliquely forward and. connected tov gether to said draw bar for guiding support therefor.

2. In a trailer, vehicle, the combination with a unitary cast frame, supporting wheels and an axle therefor, said frame comprising a transversely extending beam having integral connection with segmental arcuate turntable sections disposed thereabove in coaxial relation, a bolster centrally pivoted to said frame and having shoe members disposed on the under side thereof in spaced relation providing slidable bearing support for'said'bolsprings interposed between the outer ends of said frame beam and the axle in yielding con- I tact therewith at-all times, together with a transversely disposed leaf spring perched on the frame at its mid-point and having its outer ends shackled to the axle.

' 3. In a trailer vehicle, the combination of a unitary castframe, supporting wheels and 

